Method of making fireproof floor constructions



March 17, 1931. s. MAcoMBER METHOD OF MAKING FIREPROOF FLOOR CQNSTRUCTIONS Original Filed July 8, 1926 4 Sheets-Sheet 1 :A. Illll l IIIIIII II I llllllll I. a

March 17, 193.1. s, MACQMBEIIQ 1,796,851

METHOD OF MAKING FIREPROOF FLOOR CONSTRUCTIONS Original Filed July 8, 1926 4 Sheets-Sheet 2 March 17, 1931.

S. MACOMBER METHOD OF MAKING FIREPROOF FLOOR CONSTRUCTIONS Original Filed July 8, 1926 4 Sheets-Sheet 3 N wx //vv/v7a/P 8 5mm EV Mao/ 4552 Y :6 M Arranw-K m M b m March 17, 1931. I SJMACOMBER I 1,796,851

METHOD OF MAKING FIREPROOF FLOOR CONSTRUCTIONS 4 Original Filed July 8, 1926 4 Sheets-Sheet 4 A770 may Patented Mar. 17, 1931 UNITED STATES' PATENTi .oPFIcE STANLEY MACOMBER, OF EDGEFIELID DISTRICT, OHIO, ASSIGNOR TO THE MAOOHBEB I STEEL COMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO METHOD OF MAKING FIREPROOF FLOOR CONSTBUCTIONS Original application filed July 8, 1920, Serial No. 121,114. Divided and. thin application. filed Kay 17,

1928. Serial No. 278,428.

The subject matter of this application has been divided out of my application Serial No. 121,114 filed July 8, 1926, which has resulted in Patent N 0. 1,670,462, Means for use in making fire-proof floor constructions.

This invention relates to reinforced concrete floor systems. The invention particularly relates to systems of this character in which a special design of joist can be utilized for carryin the construction loads. The invention is urther designed so that the concrete can act as a T-beam and can take the compression stresses as it sets. The invention further relates to improved methods of making fireproof floor constructions. Either metal or wood forms can be used and in the event the latter are used, there is no swelling of the same occasioned whereby concrete is wasted because of the forms taking up the concrete nor is there any warping of the wood forms. p The claims of this application are limited to the new and useful improvements in methods of making fire proof floor constructions. In

said Patent No. 1,670,462 I have claimed the as particular new and improved forms for fireproof floor constuction and the new and impoved construction materials for making reinforced concrete floors, and in a pending application Serial No. 252,592, the subject matter of which was also divided out of the application which resulted in said Patent No. 1,670,462, I have claimed the new and .improved fire-proof floor construction obtained y the use of the forms and construction ma- 85 terials claimed in-said Patent No. 1,670,462

and by the use of the new and impoved methods claimed in this application.

I provide means whereby a temporary support which is utilized for carrying the forms can be left in the concrete so as to become part of the metal reinforcement of the floor. These supports are comprised of end and central spacing bars and suspension rods and intermediate suspension yokes. The design obviates the necessity of shoring, saves considerable time in construction and enables the pouring of the concrete for the top floor first, if desirable. The annexed drawings and'the following description exemplify in detail certain steps portion of certain supports and forms for orming reinforced floor construction by the use of the steps of my improved method, certam parts being broken away to disclose certain underlyin parts as will be hereinafter fully explaine Figure 2 is a transverse vertical section taken in the plane indicated by the line 22, Figure 1;

Figure 3 is a fragmentary transverse vertical section, upon-an enlarged scale, taken in the plane indicated by the line 3-3, Figures 1 and 6; j Figure 4 is a fragmentary transverse vertical section upon the same scale as that of Figure 3, taken in the plane indicated by the line 4-4, Figures 1 and 6;

Figure 5 is a fragmentary longitudmal vertical section, upon the same scale as Figures 3 and 4, taken in the planes indicated by the line 55, Figure 1; and

Figure .6 is a fragmentar plan view, upon the same scale as that of igures'3, 4 and 5, of a part of the elements shown at the lefthand end of Figure 1, the view being taken from the position indicated by the line 6-6, Figure 2.

Referring to the annexed drawings in which the same parts are indicated by the same respective ordinals in the several views, a main floor girder is indicated by the ordinal '1 which is adapted to be supported by concrete or steel columns, as is well known to those skilled in the art. Upon these girders 1 are supported a plurality of spaced transverse joists 2, the latter in the form of construction shown and described being a special type of bar joist described and claimed by me in my U. S. Letters Patent No. 1,651,032. Mounted upon these joists 2 are spacer bars 3 formed along their lower-edges with spaced recesses or notches 4.- .a;nd along their'upper edges with spaced recesses or notches 5. I The notches 4 furnishmeans for aligning the spacer bars 3- at the proper distroughs 9" which surr tances apart upon the joist 2, the upper chord 30 of the latter being received by the lower bar notches 4. The upper bar notches 5 re- .ceive the upper bent endsof hook bolts 6 v joist form pans 9 are supported at the desired height by the bolts 6. I The spaces between the pans 9 of the adjacent pans 9 are filled by plates 10 which are formed with strengthening ribs 11.

Supported from the bottom of the joist forms 9 are girder forms 12 formed with upperedge flanges which are secured to the 01st pans 9 by means of bolts 13 and nuts 14. The extreme outer edges of the flanges 15 of the girder forms 12 are formed with upare shortened "and the corners are notched, as

' 19, respectively,1 and side flanges 17.

wardly-turned lips 16, Figures 3 and 5, the purpose of which will be hereinafter fully described. In order to close the ends of the spaces between adjacent joist forms'9, and above the girder forms 12, I provide end caps 17 having upper and lower flanges 18 iiilid 6 side flanges 17 0 not extend quite to the upper corners of the end caps 17 but the flanges indicated by the ordinal 17 Figure 3, indieating the top of the side flange 17 and the ordinal 17 3 indicating the space between the allow for the top of this flange 17 and the adjacent end, of the top flange 18, this space 17 being con-. enlarged to provide play and to nut 8 and the slant of the mold 9. The end'caps 17 are fittedbetween adjasiderably cent joist forms 9 on the sides andbetween the covers 10 and the girder forms 12 on the top and bottom, respectively, and are lim-- ited in their inward movement by the stop lips 16 formed on the flanges 15 of the girder forms 12. I a

Three of the spacer bars 3 are ordinarily provided for eachbay of the building, one at each'end and one in the center, and other supports are formed for the joist forms 9 intermediate adjacent spacer bars 3. These other supports comprise yokes 20 which'are supported upon the upper chord 30 of the jolst 2 and are secured to the flanges 9' of the joist forms 9 by means of nuts 21L The bottom chord of the supporting joist 2 is indicated by the ordinal 31 and an end plate 32 of the joist is shown connected at one end,Figure 3, by means of a tie-plate 28 to a vertical member 25 which is formed'with a bottom flange 26 secured'to'a flange 15 of the girder ound the joist 2 and form 12, and with a to strengthening flange 27 It will be noted t at the member 25 ex- I tends in heightsomewhat above the plane of the top chord 30 of the joist 2, or slightly above the desired height of the concrete floor. The purpose of the construction illustrated by the member- 25 with flanges 26 and 27 is to illustrate the closing u of a portion of the construction where no oor is to be laid,

as for instance, an elevator well. The ends of the joist 2 are framed in the masonry wall 24, F1gure 2, by means of corbelled recesses 23 for receiving concrete to effect this framing, in combination with the extension of the bearing plate 29 of the joist 2.

From the description heretofore given of the structure shown in the accompanying drawings, it will be evident that after the elements have been assembled in the manner described, my improved method can be continued and completed by the following steps. The concrete is poured and fills the 101st forms 9 and flows over the covers 10 to form concrete joist and intermediate flooring and also flows into the girder forms 12 and fills up the space between the end caps 17 to form concrete girders and complete the concrete floor, with the joist 2, the spacer bars 3, the hook bolts 6, the yokes 20 and the girders 1 forming the 'metal reinforcement. Now, when it is desired to remove the forms, it is necessary only to take out the bolts 13, it being noticed from an inspection of Figure 3, for instance, that the nuts 14 are put upon the top ends of the bolts'13, and take down the forms 12, and then'to remove the nuts 8 and 21, whereupon the-joist forms 9 can be removed, the supporting features thereof including the spacer bars 3, hook bolts 6, yoke supports 20 and nuts 14 being left in the concrete to form part of the metallic reinforcement. i

What I claim isz" 1 1. An improvedmethod of making fireproof floor constructions consisting in, assemblinga main supporting structure; positioning form-supporting bars thereon; dependingly supporting concrete floor and beam forms from said bars, curing the concrete to make said floors and beams; and then removing the forms and leaving the sup orting members therefor to form part 0 the metal reinforcement of the floor."

2. An improved method of making fireproof floor constructions consisting 1n, as-

sembling a main supporting structure; positioning form-supportin bars thereon; de-

ndingly supporting Orin-attaching bolts rom said bars; securing concrete floor and beam forms to said bolts below said main supporting structure; pouring the concrete to .form said floor and beams; and then removing the forms and leaving said bars and bolts as part of the metal reinforcement of the floor.

and form-attaching members as a crete girder forms to said concrete joist forms below said supporting girders; pouring the concrete to form the floor and the concrete joists and girders; removin the concrete girder forms; and then removmg the concrete joist forms'and leaving said supporting bars part of the metal reinforcement of the floor. Signed by me this 14th da of May, 1928. STANLEY COMBER. 

